The Lightning have signed defenseman Luke Witkowski to a two-year contract today, vice president and GM Steve Yzerman announced. 

Witkowski appeared in 38 games as a captain with the Western Michigan University Broncos in 2012-13, recording two goals and 10 points to go along with 46 penalty minutes while being named Second-Team All-CCHA. He led the Broncos with 53 blocked shots and ranked second for penalty minutes.